403447 - text within SVG foreignObject under rotation has wandering baseline

Status: NEW

(Core :: SVG, defect)

Description

[John Daggett (:jtd)]

Attachment: screenshot of rotated vs. unrotated text

The text that appears in a SVG foreignObject tag that references an iframe containing HTML text elements is rendered inconsistently across the line, the text appears to be rendered at various distances from the baseline.

Steps: click on the URL and compare with the original, unrotated version:

http://starkravingfinkle.org/blog/2007/11/openkomodo-is-open-for-business/

The attachment screenshot shows both versions.  Note the way "involved" dances all over the place in the rotated version.

My guess is that this is an underlying Cairo problem but I'll start by logging it against SVG for now.

Comment 1

[Mike Schroepfer]

Moving to P5 blocker

Comment 2

[Vladimir Vukicevic [:vlad] [:vladv] (needinfo me, slow to respond)]

I'm not actually sure that this is a bug -- it could be that the rotated text is being hinted aggressively, thus pushing some of the vectors in alignment with vertical pixels...

Comment 3

[Robert Longson [:longsonr]]

Fixed on trunk provided you have Vista or Windows 7 and direct write is enabled (gfx.font_rendering.directwrite.enabled = true)